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MOST IMPORTANT general science mcq - 16 EXERCISES
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The following question based on light, heat, thermodynamics, wave motion, sound, optics & oscillations topic of general science mcq
(a) black
(b) coloured
(c) white
(d) that of the glass colour
The correct answers to the above question in:
Answer: (c)
All colours are reflected.
Discuss Form
Read more light heat thermodynamics wave sound optics oscillation Based General Science Questions and Answers
Question : 1
Heat travels through vacuum by
a) Radiation
b) Conduction
c) Convection
d) Both (a) and (b)
Answer »Answer: (a)
Heat radiations are electromagnetic waves of high wavelength.
Question : 2
The velocity of sound in air is approximately
a) 10 mile/min
b) 330 m/s
c) 10 km/s
d) 3 × $10^10$ m/s
Answer »Answer: (b)
Question : 3
Resonance is an example of
a) free vibration
b) tuning fork
c) forced vibration
d) damped vibration
Answer »Answer: (c)
Question : 4
Two spheres of same size are made of the same metal but one is hollow and the other is solid. They are heated to same temperature, then
a) solid sphere will expand more than the hollow one
b) both spheres will expand equally
c) hollow sphere will expand more than the solid one
d) None of the above
Answer »Answer: (b)
Question : 5
The Sun is visible to us a few minutes before the actual sunrise because of
a) Total internal reflection of light
b) Diffraction of light
c) Scattering of light
d) Refraction of light
Answer »Answer: (d)
Question : 6
What changes will the volume of water show if the temperature is lowered from 9ºC to 3ºC?
a) The volume will first increase and then decrease
b) The volume will first decrease and then increase
c) The volume will not change
d) Water will freeze
Answer »Answer: (b)
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